An equalization model is presented that seeks optimal solutions to wide area low-frequency sound reproduction in closed acoustic spaces. The methodology improves upon conventional wisdom by incorporating a generalized subwoofer array where individual frequency dependent loudspeaker polar responses are described by complex spherical harmonic frequency dependent functions. Multi-point system identification is performed using 3-dimensional finite-difference time-domain simulation with optimization applied to seek global equalization represented by a set of orthogonal transfer functions applied to each spherical harmonic of each subwoofer within the array. The system is evaluated within a 3-dimensional virtual acoustic space using both time and frequency domain metrics.
Authors:
Hill, Adam J.; Hawksford, Malcolm O.
Affiliation:
University of Essex, Colchester, UK
AES Convention:
128 (May 2010)
Paper Number:
8074
Publication Date:
May 1, 2010
Subject:
Loudspeakers and Headphones
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